Quick-acting shut-off valve for oil burners, etc.



Nbv. 29, 1927. 1,651,034 R. D. MclNTOsH QUICK ACTING SHUT-OFF' VALVE FOR OIL BURNERS, ETC

Filed Dec. 6. 1922 BRN? Patented Nev. 29, lea?.

uNrrED STATI-:s

1,651,034 PATENT oFFicE.

' ROBERT D. MIN'OSH, RIVER FOREST, ILLINOIS, ASSIGN'OR TO THE IIVIPERIAL BRASS MANUFACTURING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 01E' ILLINOIS.

'Application led December 6, 1922. Serial No. 605,232.

l cut olif before any substantial amount of oil has flowed through the'burner.

To this end, vit, consists of' a bucket connected to a lever controlling a quick-acting shut-olf valve placed in the supply line, the bucket being located adjacent the discharge end of the overflow pipe of the oil. burner, so that when a suiicient weight of the overflowed oil has entered. the bucket, the quickacting shut-0E valve will betripped and the' oil-supply line instantly and completely shut To illustrate my invention, I annex hereto a sheet of drawings, in which the same reference characters are used to designate identical parts in allthe figures, 'of which,-

Fig. 1 is a perspective view of a vportion of an oil burner having my invention applied thereto;

Fi 2'is a side elevation of thesaety valve l3o and t e attached bucket;

Fig. 3 is a front elevation as seen from the line 3-.'3 of Fig. 2; and v Fig. 4 is a vertical section as seen on the section 'line 4 4 of the same figure. e5 10 represents a portion of a furnace having an oil burner connected therewith, which oil. burneris supplied from the pipe 11 having the adjusting valve 12" therein by which the rate of the feed of the oil can be con lo trolled. As is well known, these oil burners are supplied with a pilot light, and also with an overflow pipe 13 fromthe lower end of which the oil'will be discharged in case it is not burned. The mechanism thus far described may beef any ordinary'constructionl and, per sie, forms no part of my invention.

In the supply line 11, I locate the shut-oli valve 14, which consists of a valve casing in thegeneral shape of across, with thesupply entering throu h the pipe 11'screwed therein and through t e small port 15 whichopens into the internally-threaded'4 chamber 16,

p which is vclosed at lts lower end byithe cap screw 17 threaded therein. At the top of the chamber 16 is the annular valve-seat 18,

which forms the bottom of the passage 19 connecting the chamber 16 with the outlet port 20, opening into the continuation of the pipe 11 threaded into 4that end of the valve casing. The valve is shown in Fig. 4 as open, the valve consisting of the stem 21 having secured on the lower end thereof the valve disk 22 held in place by the nut 23 .threaded on the lower end of the valve stem 21. The disk 22 is provided with the leather or rubber washer 24 which engages the valve seat 18. A hclically-coiled expanding sprinfr 25 located in Ithe hollow of the cap screw 17 and having its upper end engaging the under side of the valve 2 2 tends to close the valve, but is normallyy restrained :from doing so by the position of the bucket 26 and its connections, which will now bel described. The bucket 26 is suspended by the bail 27 from the power end of the lever 28, which is fulcrumed by the screw 29 to the ear 30 projecting from the valve casing14. The normal position of the valve is controlled by the set screw 31 threaded through the body of the valve and engaging the bottom of the cap screw 17. A lock nut 32 serves to secure the set screw'31 in any position to whichjt may be'adjusted, and 1t will be understood 'that the position of the set screw 31 controls the amount of movement that has to be given to the lever 28 before the quick-acting closure of the valve occurs. Pivot/ed to the lever 28 by the screw 33 is a link 34 pivoted at its. upper end by the screw 35 to the lever 36, which is ulcrumed by the screw 37 between the ears 38 formed on the top of the valve casing 14, 'll-he lever 36 bears on the upper end of a plunger 39, which has its enlarged, rounded lower end 40 engagin the flexible diaphragm 41, which is prefere ly composed of rubber Yreinforced by abric,/and taking the shape of a concave disk with its edges resting on the annular seat 42 formed in the top of the valve casing l14 and held yin place by themetal ring 43 resting thereon, which in turn is held in place by t e hollow nut 44 screwed into the top of the casing 14 and having the s uared end 45'by which it may be turned. t will be understood that the stem of the plunger39 passes loosely through the central aperture of the -nut 44, so .that

' there is no `friction to impede' the movement of the plunger 39 once its movement becomes possible.

The operation of the device will now be apparent: The apparatus is normally set as shown in full 'lines in Fig, 2, and in this position the oil supply can flow in through the port 15, up through the channel 19, and out through the port v20. In case there is any overflow' of the oil from the pipe 13 into the bucket 26, the weight of the oil will eventually swing the lever 28 downwardabout its v instantly shutting off the flow of the oil.

through the supply pipe 1 1. Owing lto the fact that the bucket 22 is moved so rapidly by the actionof the spring, there is a tendency to throw the oil out of the bucket, and, to

' counteract-this, I provide it with the annular.

funnel-shaped cover 46, which may be permanently secured thereto, and which has the central aperture sufficient to admit the oil,

, but not allowing any substantial quantity of it to be thrown out during the rapid move-- ment of the bucket 26 from the full-line to the dotted-line position shown in Fig. 2. A

While I have shown the nevel quick-acting valve as applied to an oil burner, it will be understood that the valve per se might be used in different combinations; and. 1t will also be understood that,'while I have shown and described my invention as embodied in the form which I at present consider best adapted to carry out itspurposes, itis capable of modifications, and that I do not desire to be limited in the interpretationof the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

In a quick-acting valve, the combination with a cross-shaped valve-casing having an inlet port in one end, an outlet port at the opposite end, chambers in the intermediate ends, a passage between the chambers, a valve seat at one end of the passage, a valve therein having a stem sliding through the passage, a -helically-coiled expanding spring in the chamber with'the .valve and tending to seat it. a diaphragm i-n the other chamber, an opening from the other chamber, a plunger engaged by the diaphragm and extendingand moving through the opening, and controlling means engagin the outer end of the plunger, said contro ing means consisting lof a pair of levers connected by a link, one of saidlevers enga ing the plunger and the other having its fu crum so located that its movement swings the link across its ulcrum point to release 'the dead Acenter and permit the spring to act to close the valve.

In witness whereof, I have' hereunto set my hand this 4th.da -of December, 1922. A

' ROB RT D..MCINTOSH. 

